Abstract
Shelf life predictions for solid rocket propellant formulations depend upon the existence of a reliable and efficient accelerated aging method. Results presented in this paper demonstrate the failure of simple models like Arrhenius to predict the aging behavior of some composite propellants. This work proposes a new approach for accelerated aging studies of the degradation of the polymeric binder in such propellant formulations. Using a reaction severity index, simple kinetic models have been demonstrated to adequately model the degradation behavior of various propellants submitted to isothermal aging. Furthermore, the versatility of the method allows shelf life predictions for samples experiencing temperature cycles during aging.
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